The invention provides a printer where a continuous paper/cut paper changeover lever for changing over a continuous paper print mode and a cut paper print mode can be smoothly tuned so as to reduce a load on a drive mechanism and improve durability. A platen gear and a continuous paper/cut paper changeover lever at an end of a platen shaft, the platen gear is fitted to the outer periphery of the end of the platen shaft and fastened thereto by a pin. The continuous paper/cut paper changeover lever is fitted onto the outer peripheral portion of an extension portion of the platen gear. Engagement pawls of the continuous paper/cut paper changeover lever engage an engagement projection formed on a boss portion of the platen gear to be engageably held in a turnable manner relative to the boss portion of the platen gear.